Vim Backup Life Saver

backup.vim

let $temp_dir='/tmp/vim-' . $USER
 
# create temp directory if it doesn't exist
if getftype($temp_dir) != 'dir'
  exec 'silent !mkdir ' . $temp_dir
endif
 
set backup writebackup
set backupdir=$temp_dir # directory for backup files
set dir=$temp_dir       # directory for swap files